Author: Joachim Rang
Date: 11:57:55 09/09/02
Go up one level in this thread
On September 09, 2002 at 13:21:13, Roy Eassa wrote: >On September 09, 2002 at 11:20:28, Janos Keinrath wrote: > >>[D]2kr3r/1p2q1b1/pPp3p1/5p2/3PpP2/1QR1P3/5P1p/2R2B1K b - - >> >>In a blitz game my program played here Kb8 and lost after Bxa6. >> >>Crafty 18.15 after 5 minutes also want to play Kb8 (Celeron 1.2 / 32MB Hash). >> >>Is there any defence for black in this position? >> >>Janos > > >I studied this one a long time, with Fritz & Shredder, and I think Black might >just escape if he plays perfectly. However, there are many missteps that permit >White a nice victory: > > >1...Rd6! > > [1...Kd7 2.Bxa6! Ke8 3.Bxb7! Qxb7 4.Rxc6 Kf8 5.Rc7 +-] > > [1...Kb8 2.Bxa6! bxa6 3.Rxc6 Bxd4! 4.Rc7! > (A: 4.exd4 e3! 5.f3 e2 6.Qc3 > (6.Re6 Qb7 = > (or 6...Qd7 7.b7 Rde8 =) > 6...Qd7 7.Re1 Qd5 =) > (B: 4.Qc2 Qa3 5.b7 Kxb7 6.Qc4! Qd3 7.Rc7+ Kb8 8.Rb7+ Kxb7 9.Qc7+ =) > 4...Qe8 > (A: 4...Bxe3 5.fxe3 > (or 5.Rxe7 Bxc1 6.Ra7 Bxf4 7.Qa4 +-) > 5...Qd6 6.Qc2 a5 7.b7 Qb6 8.Rc6 Qxb7 9.Qc5 +-) > (B: 4...Qf6 5.exd4 Qd6 6.Qf7 Qxb6 7.R7c6 Qb7 8.Qa2! Rxd4 9.Qe6! +-) > 5.Qc4! > (5.exd4 Qb5 =) > 5...Bxb6 6.Qxa6 Rd1+ 7.Rxd1 Kxc7 8.Rc1+ Qc6 9.Rxc6+ Kxc6 10.Qc4+ +-] > >2.Bxa6 Kd8 > > [perhaps easier is 2...bxa6 3.Rxc6+ Rxc6 4.Rxc6+ Kb8 5.Rc7 > (5.b7 Bxd4! 6.exd4 e3! =) > 5...Qf6 6.Qb4 > (6.Qa2 Qxb6 7.Rxg7 Qc6 =) > 6...Rd8 7.Qa5 Rxd4! 8.exd4 Qxd4 9.Qxa6 Qd1+ 10.Kxh2 Qh5+ =] > >3.Bc4 Qh4 > > [3...g5 4.Qa2 Qd7 5.fxg5 Rh5 6.Qa8+ Qc8 7.Qxc8+ Kxc8 8.Ra3 Rxg5 > 9.Ra8+ Kd7 10.Rb8 Rdg6 11.Bf7 Rg1+ 12.Kxh2 R6g2+ 13.Kh3 Bf6 > 14.Rxb7+ Kd6 15.Be8 Rxc1 16.Kxg2 Rb1 ±] > >4.Qa2 Ke7 5.Bg8! Qh3! > > [5...Qf6 6.Ra3! Rd8 7.Rxc6! bxc6 8.Ra7+ Ke8 9.Rf7 Qd6 10.Rxg7 +-] > >6.Qf7+ Kd8 7.Qc7+ Ke8 8.Bf7+ Kf8 9.Qxd6+ Kxf7 10.Qd7+ Kg8 11.Qe6+ Kh7 >12.R3c2 Bxd4! 13.Qf7+ > > [13.exd4?? Qf3+ 14.Kxh2 Kg7+ 15.Kg1 Rh1#] > >13...Bg7 = impressive analysis! Thx a lot!
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